JL AUDIO A6450 13
D) Subwoofer Level Control Only:
Req uired: a source unit or processor with
one pair of stereo outputs and dedicated
subwoofer outputs.
Inp ut Connections: the stereo pair of source
unit outputs each split with a “Y-Adaptor”
allowing the left signal to be sent to the “CH
1 (Left)” and “CH 3 (Left)” inputs and the
right signal to be sent to the “CH 2 (Right)”
and “CH 4 (Right)” inputs of the A6450. The
source unit’s dedicated subwoofer outputs are
connected to the “CH 5 (Left)” and
“CH 6 (Right)” inputs (select “Discrete” on
the “Input Mode” switch in the “Channel 5 &
6 Controls” section).
Res ult: in this mode, the user has the ability to
control the absolute level of the LF channels
relative to the HF channels.
E) Independent level control of all three
channel pairs:
Req uired: a source unit or processor with
two pairs of stereo outputs and dedicated
subwoofer outputs.
Inp ut Connections: one pair of stereo source
unit outputs is connected to the “CH 1
(Left)” and “CH 2 (Right)” inputs, the
second pair of stereo source unit outputs is
connected to the “CH 3 (Left)” and “CH
4 (Right)” inputs and the source unit’s
dedicated subwoofer output is connected
to the “CH 5 (Left)” and “CH 6 (Right)”
inputs (select “Discrete” on the “Input
Mode” switch in the “Channel 5 & 6
Controls” section).
Res ult: in this mode, the user has the ability to
control the absolute level of the LF channels as
well as both pairs of HF channels.
When using a source unit’s dedicated
subwoofer output, set the “Input Sens.” of any
channels receiving input from the subwoofer
output with the source unit’s subwoofer level
control set at 3/4 of full output. See Appendix A
(page 14) for details.
Crossover Setup for Bi-Amplified System
with one A6450:
Once the input sections have been configured
appropriately, go to the “Channel 5 & 6
Controls”. Select “LP” (low-pass) on the “Filter
Mode” switch and an appropriate “Filter Freq.”
(80 Hz is a good starting point).
Next, turn your attention to the “Channel 1 &
2 Controls” and “Channel 3 & 4 Controls” and
select “HP” (high-pass) on the “Filter Mode”
switches and an appropriate “Filter Freq.” (again,
80 Hz is a good starting point).
After proper adjustment of the “Input Sens.”
controls for all three channel pairs using the
method shown in Appendix A (page 14), you can
fine tune filter frequencies and attenuate any pair
of channels to achieve proper balance. For precise
filter frequency information refer to Appendix B
(page 15).
12 JL AUDIO A6450
To Next Page
